Using iphone to shoot concert video without overexposing faces?

[shutterhappens]

I don't have an iphone but I need to instruct a non professional using an iphone to shoot better video during a concert.

How do you use iphone to shoot a stage performance without overexposing people faces?

This iphone is set on a gimbal, so I'm looking for a solution that does not require frequent touching of the iphone.

Is there a mode that detects people's faces (as many of them as possible) and use them for exposure, instead of the default mode that presumably averages the brightness of the whole picture?

 

[Bob A L]

Have you tried this and observed this overexposure? I would suspect the iphone would be able to handle this.